Slitter and rewinder



Noy. 10, 1931. K. sil-:G j 1,831,201

sLITTEn AND fmswmmimv i Filed Dec. s. 1929' 2 smeris-sneer ATTORNEYJ`Nov. l0, 1931.

K. slEG 1,831,201

SLITTER AND REWINDER Filed'Dec. 3. 1929 2 Sheets-Sheet 2 ATTORNEY.

A-qas' Patented Nov. ,10, 1931 y UNITED STATES PATENT oFFlcE KARL SIEG,0F BROOXLAWN, NEW JERSEY', .ASSIGNOB T0 SAIUEL I. I'ANGSTQN CO., 0F

' CAHDEN, NEW JERSEY, A. CORPORATION 0F NEW JERSEY suman um nEwINDEn vApplication med December s, 1929. serial No. 411,234.

My present invention is an improvement in web wlnding machines of thethree roller or drum type, in which the roll of material being wound issupported uponV a pair of driven drums and pressed down by a su rposeddrum or roller which is also prefera ly positively driven.

The invention is more especially concerned with means for raising andlowering the pressure roller at times when the roll of paper is to beremoved or a new rewinding reel or core inserted.

An object of the invention is to provide y power driven means forraising and lowering the pressure roller whereby the manual labor reuired is reduced to a minimum. A further ob] ect is to permit loweringof the roller without danger of sudden gravity descent of the rollerwhich might injure the operator or the machine or which might tend toforce the roller too far unless carefully watched.

Another ob]l ect is to provide a roller operating mechanism entirelyfool-proof in action in that, if the operator inadvertently fails to cutoif the power when the roller has reached the desired raised position,continued running of the motor cannot injure the mechanism, move theparts too far, or cause any damage.

Another object is to provide a power operated controlling and actuatingmeans which roller to any desired extent to the end that the resistanceof the roller to upward movement may be caused to exceed its weight.

Another object is to accomplish the foregoing results with an operatingmechanism of simple design, of low cost and of rugged construction. v

I have illustrated my invention as applied to a type of machine, thepressure roller of which is journaled in the ends of a pair of preferredconstruction the motor shaft is coupled through a train of speedreducing gearing to a sector plate on the said rock shaft. As onefeature the sector is of such arcuate length that it passes out ofengagement with the normally meshing gear when the pressure rollerreaches its uppermost position and thus prevents further lifting of theroller. Interposed in the gear train is a worm and screw whichpreventsthe'heavy pressure roll from descending by gravity and drivingback through the train to reverse the motor or, in other words, whichserves as an escapement for the gear train (which is loaded by thepressure roller) when the motor is running 1n reverse. Also interposedin the train is a ratchet and pawl mechanism which serves as anoverrunning clutch to permit stopping of the pressure roller if themotor continues to run 1n reverse after the pressure roller has reachedits lowermost position. The also permit the pressure roller to be slow yelevated by the expanding rewound paper roll without disturbing otherparts of the operating gear train.

Rotary motion of one gear of the train is preferably frictionallyopposed, whereby to load the pressure roller on its upward movement andretard or cushion its downward movement.

The invention may be more fully understood from the followingdescription in connection with the accompanying drawings wherein:

Fig. 1 is a somewhat diagrammatic verticall sectional view through aslitting and rewinding machine embodying the lnvention; l

Fig. 2 is an end view of a portion of the machine, showing in elevationthe driving and controlling mechanism for the pressure roller; and

Fig. 3 is a top plan view of the parts shown v ends of the arms 14travel in vertical guideways 18 in the frame so that as the rock shaft17 is oscillated, the movement of the pressure roller 13 is vertical.The pressure roller is preferably positively driven at a slightly highersurface speed than the drums 11 as is common in the art. The mandrel isnot driven and the winding is done by the action oflhe drums 11 and 13in rotating the paper ro The paper passing from the roll A is trainedunder a guide roll 19, over a tensioning roll 20, under another guideroll 21 and thence drawn between a battery of slitters 22-22, passedover the'lirst drum 11, and wound on the roll B.

The machine, as thus far described, is merely one type to which myinvention may be applied and is not in itself hereinafter claimed. Itserves to unwind the paper from the roll A, trim or slit itlongitudinally to .the desired width or widths, and' rewind it.

My present invention is more especially concerned with the meansI forraising and lowering the pressure roller 13 when it becomes necessaryvto remove a rewound roll or to begin windin a new roll. One form of mynovel operating mechanism is shown in F1 s. 2 and 3.

e specific form illustrated includes a reversible electric motor 23,mounted upon a suitable platform or table- 24 at one end of the machineand havin its driving shaft coupled by a universal jomt 25 to an alignedworm shaft 26 mounted in a transmission casing 27, and meshing with aworm wheel or pinion 28 fixed upon a shaft 29 extending at right anglesto the worm 26 and in parallelism with the rock shaft 17. This worm andpinion constitute a reduction gearing which is reversible in the sensethat the direction of rotation of the worm can be reversed but isirreversible in the sense that the pinion cannot drive the worm. Apinion 30 on the shaft 29 drives a sprocket wheel 31 on a parallelcountershaft 32 through the intermediacy of a sprocket chain 33. Thesprocket wheel 31 is much larger than the pinion 30 so as to give afurther speed reduction. Sprocket wheel 31 carries a dog or pawl 34coacting with a ratchet wheel 35 fixed to or integral with a sleeve orcollar 36 rotatable upon the countershaft 32. Fixed upon or integralwith this sleeve is a pinion 37 in mesh with the teeth 38 of a sectorplate or gear segment 39 which is fixed upon the rock shaft 17.

In operation, assume that the pressure roller is in the position of Fig.1 and that the roll of rewound paper has reached the desired diameter.In order to remove this paper from between the three winding drums it isnecessary to elevate the upper drum or pressure roller. To accomplishthis, the motor 23 is started and acts through the reducing gear train,above described, to actuate the sector plate 39 thereby turning the rockshaft 17, lifting the arms 16 and with them lthe roller 13. lVhile themotor is running in a direction to elevate the pressure roller the driveis through the ratchet and pawl 34:-35, that is to say, the pawl on thesprocket wheel positively drives the ratchet wheel during rotation ofthe sprocket 31 in a clockwise direction and movement of the gearsegment in a counterc-lockwise direction. If due to the negligence ofthe operator, he omits to cut off the motor 23, no harm can be done,because the gear segment 39 is so proportioned and positioned in respectto the other parts that as the pinion 37 reaches the last tooth of thesegment, the segment and pinion will unmesh and the further or continuedrotation of the pinion will not cause any further movement of thesegment or any further upward move-v ment of the pressure roller.

When the motor is stopped the pressure roller tends to descend by itsown weight. Such gravity descent of the roller is effectively blocked bythe action of the irreversible worm and pinion reduction gear 26-27 in adriving gear train. Thus the pressure roller is held in elevatedposition until such time as the worm itself is positively rotated in theopposite direction.

After the roll is removed a new mandrel is placed on the drums 11-11 andthe pa er trained around it. It then becomes desira le to lower thepressure roller 'onto the new but very small roll. To accomplish thisthe motor is reversed, reversing the direction of rotation of the wormand permitting the weight of the, roller itself to reversely drive thegear train as rapidly as the worm 26 will permit. During this o erationthe weight of the roller acts through the sector 38, pinion 37, sleeve36, ratchet wheel 35, and pawl 34 to reversely drive the sprocket 31.Here again, if the motor is not cut oif no harm can occur since, whenthe pressure roller reaches its lowermost position in contact with thepaper or even the operators fingers on the paper, there will be nofurther tendency for the pressure roll itself to drive the gear trainand consequently the motor actuated, reverse drive of the sprocket wheel31 will simply cause the pawl to overrun its ratchet.

This slowl descent of the pressure roller is important not only in thatit eliminates sudden shocks and jars on the machine proper, but itprevents an operator from having his fingers injured by the pressureroller dropping upon them as he is smoothing the paper on the mandrel.In fact the pressure roller may slowly and gently descend on the ingersof the operator without an other eiect thantransmitting the weight o thepressure roller to the operators hand. This weight, in itself, isnot'suicient to cause injury.

As the new roll is rewound on the new reel and its diameter increases,the ressure roller will be elevated b the building up of the paper onthe reel. his elevation of the ressure roller is unaccompanied by anydriving of the operating gear train, since, as the roller rises and thesector plate 39 correspondingly swin s in a'countercloc-kwise directionas viewe in Fig. 2, the ratchet wheel willloverrun its dog and no motionwill be im arted by the s rocket wheel 31.`

s best seen in ig. 3 the drivin r and controlling means for the ressurerol er has associated therewith a rake mechanism by which the resistanceto the pressure roll to the upward thrust of the paper roll may beincreased to any desired extent. In my im: proved construction the brakemechanism does not eiect the lowering or raising of the roller by themotor. It merely resists the pushing of the roller upwardly when themotor is at rest.

sleeve 44 and normally urged into frictional engagement with the disc-41by a coiled expansion spring 47 encircling the sleeve 44 and reactingagainst a nut 48 mounted on the threaded end of the sleeve 44. This nut'ma be provided with a ring handle 49 and a justed along the sleeve 1norder to properly tension the spring 47 and thereby predetermine thefriction between the cooperating clutch discs. Inasmuch as one of thediscs 41 is ixed to turn with the pinion 37 and another of the discs 42is keyed to the shaft 32 and through it to the irreversible gearing andthe motor, the load on the pressure roller may be variedby varying thepressure exerted by the spring 37 in forcing the discs together. Thusthe resistance to its upward movement of the pressure roll under theiniluence of the expanding rewound paper web may be varied at will. Theclutch may be released to facilitate lowering of the pressure,

if that be necessary.

Various changes may be made in the construction illustrated and variousmechanical equivalent parts may be employed in place of those shown.Merely as examples, a gear train might be used in place of the sprocketsi, and cham; some source of power other than a pinion to lock the rollerat any elevation to ich it may be raised by the motor, said motor beingreversible to permit descent of the roller by its own weight at a speeddetermined by the speed of the rotation of the worm, and a ratchet andpawl in the'train forming part of the `drive as the roller is elevated,and serving as an overrunning clutch when the roller reaches itslowermost position with the motor running in reverse direction.

2. A winding machine including a support for a roll of material beingwound, a pressure roller on the top of the material, a movable framecarrying the pressure roller, a motor, and a speed reducing gear trainconnecting the motor to the frame, and including a Worm and a pinion tolock the roller at any elevation to which it may be raised by the motor,said motor bein reversible to permit descent of the roller by its ownweight at a speed determined by the s eed of the rotation of the worm,and a ratc et and pawl in the train forming part of the drive as theroller is elevated and serving as an overrunning clutch when the rollerreaches its lowermost position during lowering of the roller with themotor running, and said ratchet and pawl also permitting elevation ofthe pressure roller under the influence of the expanding roll when themotor is at rest.

3. A winding machine including a support for a roll of material beingwound, a pressure roller engaging the roll and having movable bearingpermitting bodily movement of the roller and building .up of the roll, amotor, and a speed reducing gear train connecting the motor to saidbearings and including a worm driven by a motor, a worm wheel in meshwith the worm, a countershaft, driving connections between said Wormwheel and said countershaft, a toothed sector connected to saidbearings, a sleeve turning on'the coun! tershaft, a pinion on the sleevemeshing with the sector, a ratchet wheel fixed to the sleeve, and a dogdriving the ratchet from said driving connections. l

4. A three drum slitter and rewinder including a vertically movablepressure drum adapted to rest on the material being wound, a pivoted armcarrying said drum, reversible motor means operatively connecting thearm and motorto permit positive elevation of the drum by the motor andpermit gravitational descent of the drum at a speed controlled by themotor, and means whereby the motor runs idly after the drum has reachedits uppermost cr lowermost position.

5. Winding mechanism having a pressure ioller adapted to en age with thematerial during the windin t ereof, motor operated means for lifting epressure roller oil the material, and for lowering the roller, and abrake mechanism ermitting free movement of the roller by tlie motoroperated means, but resisting upward movement of the roller by action ofincrease in diameter of the roll of material.

6. A'winding machine including a support for a roll of material to bewound, a pressure roller adapted to rest on the top of the roll beingwound, a movable frame carrying said roller, a motor, a speed reducinggear train connecting the motor to the frame for raising the roller andfor controlling the gravity descent of said roller, and means forautomatically disengaging the operative connection between said motorand said frame when said roller has been lowered to a predeterminedposition.

7. A winding machine including a support for a roll of material to bewound, a pressure roller adapted to rest on the top of the roll, amovable frame carrying the pressure roller, a motor, a speed reducinggearing connecting the motor to the frame and including an overrunningclutch forming part of the drive between said motor and said rollerduring raising of the roller by said motor, and permitting the motor tocontinue running after the roller has been lowered into engagement withsaid roll.

8. A winding machine including a support for a roll of material to bewound, a pressure roller adapted to engage the top of the roll, amovable frame carrying the pressure roller, a motor, and speed reducinggearing connecting the motor to the frame, and including means forpermitting the gravitational descent of the roller at a speed controlledby the motor, andan overrunning clutch forming part of the drive betweenthe motor and the frame and permitting the roller to stop in itslowermost position while the motor is running.

9. A winding machine including a support for a roll of material to bewound, a pressure roller adapted to engage the top of the roll, amovable frame carrying the pressure roller, a motor, and speed reducinggearing connecting the motor to the frame and including a worm andpinion to lock the roller at any elevation to which it may be raised bythe motor, said motor being reversible to permit descent of the rollerby its own weight at a speed determined by the speed of the rotation ofthe worm, and an overrunning clutch forming part of the drive betweensaid motor and said frame, and permitting the roller to stop in itslowermost position while theA pressure roller adapted to engage the topof the roll, a movable frame carrying said pressure roller, and'gearingand an overrunning clutch in series connecting the motor to the frame,for raisin the frame and for control- 11n the gravitational descentthereof by rotation of the motor, and rmitting the upward movement ofthe ro er and frame due to increase in size thereof and while said motoris at rest.

11. A winding machine including a support for a roll of material to bewound, a pressure roller adapted to engage the top of the roll, amovable frame carrying the pressure roller, a motor, gearing connectinthe motor to the frame, an overrunnin c utch forming part of the drivebetween said roller and the motor, and permitting the roller to stop inits lowermost position while the motor is running, and also permitting uward` movement of said roller under the in uence of the expanding rollof, material'when the motor is at rest, and adjustable means connectedto one element of said overrunning clutch to yieldingly resist saidupward movement.

Signed at Camden, in the county of Cainden and State of New Jersey this27th day of November, A. D. 1929.

KARL SIEG.

